Out

Four women who work the midnight shift at a boxed-lunch factory in the Tokyo suburb of Musashi-Murayama are drawn into an escalating spiral of crime after one of them murders her husband. Masako Katori, 43, leads the group with quiet authority; she was forced out of a 22-year career at a credit company called T Credit and Loan and now endures a hollow home life with a withdrawn husband and a teenage son who has stopped speaking. Her companions include Yoshie Azuma, a widow in her late fifties called "the Skipper" for her speed on the assembly line, who cares for a bedridden mother-in-law on almost no sleep; Kuniko Jonouchi, a flashy, debt-ridden 29-year-old; and Yayoi Yamamoto, a beautiful young mother whose marriage is crumbling.

One night after the shift, Yayoi reveals that her husband Kenji has gambled away their savings playing baccarat, a card game, at an illegal casino in Shinjuku and has started hitting her. The novel sketches each woman's private misery: Kuniko's failing relationship with her common-law husband, Yoshie's exhausting cycle of elder care and poverty, and Masako's domestic isolation.

Separately, the novel introduces Mitsuyoshi Satake, a 43-year-old owner of a hostess club and an unlicensed baccarat casino called Playground in Kabuki-cho, Tokyo's entertainment district. At 26, while working as an enforcer for a yakuza, a Japanese organized-crime syndicate, he tortured and murdered a woman, an experience that has defined him ever since. When Kenji causes trouble at Satake's clubs by stalking a hostess and demanding credit, Satake beats him and throws him down a flight of stairs.

That same night, Kenji stumbles home bloodied. Yayoi, consumed by hatred after months of abuse, slips off her belt and strangles him. Feeling no remorse, she calls Masako, who asks what Yayoi wants. Yayoi says she wants life to continue as before, for the children's sake. Masako drives over, loads the body into her car trunk, and instructs Yayoi to go to work as usual and build an alibi. On the dark road to the factory, Masako is grabbed by Kazuo Miyamori, a 25-year-old Brazilian-Japanese factory worker who has been assaulting women in the area. She talks him into releasing her and arrives at work shaken but composed.

Masako decides the only workable plan is to cut the body into pieces and dispose of them with household garbage. She recruits Yoshie by leveraging a recent loan and offering payment. In Masako's bathroom, the two women dismember Kenji using kitchen knives and a saw. Kuniko arrives mid-operation hoping to borrow money; Masako shows her the body and offers cash in exchange for help disposing of the bags. They divide the remains into dozens of portions, with Masako burying the head near Lake Sayama.

Kuniko, overwhelmed and careless, dumps all 15 of her bags in trash cans at Koganei Park instead of distributing them as instructed. Police discover the remains and identify them as Kenji's through a palm print. Detectives question Yayoi, who performs the role of the grieving wife. When she mentions Kenji's gambling, the investigation shifts toward Kabuki-cho. Masako notes that a 50-million-yen life-insurance policy on Kenji could work in Yayoi's favor.

Police find Kenji's jacket at Satake's casino and learn of their fight the night Kenji vanished. They detain Satake and confront him with his prior murder conviction, but he denies involvement. He privately suspects Yayoi killed Kenji, based on her composed television appearance. After a month, he is released for lack of evidence, but his clubs are ruined and his past is public. He vows to find the real murderer.

Meanwhile, Akira Jumonji, a 31-year-old former gang member who runs a loan-sharking operation called the Million Consumers Center, discovers the women's secret. Kuniko, desperate after her common-law husband quits his job and disappears, pressures Yayoi into signing as guarantor on a loan. When Masako retrieves the contract from Jumonji's office, he recognizes her from her former job at T Credit and Loan. He then persuades Kuniko to reveal everything about the murder in exchange for canceling her debt.

Jumonji approaches Masako with a business proposal: They will offer a body-disposal service, with Masako dismembering corpses and Jumonji shipping the remains to an incinerator through his yakuza contacts. Masako negotiates a fee of 4 million yen per job. Their first assignment goes smoothly. Combined with the 2 million yen Yayoi pays her from Kenji's insurance settlement, Masako begins accumulating escape money.

Satake conducts his own investigation, spending nearly 10 million yen on a detective agency. He plants a woman in Yayoi's neighborhood to befriend her, takes a job as a security guard at the factory parking lot under the alias "Yoshio Sato," and rents an apartment in Kuniko's building. He confirms that Yayoi killed Kenji and that Masako organized the disposal.

His revenge begins with Kuniko. She has quit the factory and, attracted to the guard she knows as Sato, visits his apartment. He strangles her, then arranges for her body to be delivered to Masako through Jumonji's own network, paying as an anonymous client. When Masako unwraps the body and recognizes Kuniko, she understands the message: Satake knows everything.

Masako retaliates by forging loan documents listing Satake's alias as co-signatory on Kuniko's debts and sending collectors to harass him. She leaves the underwear he used to gag Kuniko on his doorknob. The harassment forces him from his apartment, but he escalates: He visits Yayoi, reveals he knows she killed Kenji, and coerces her into withdrawing her entire 50-million-yen insurance settlement.

The women's lives fracture. Yoshie, whose older daughter Kazue has stolen her savings and whose teenage daughter Miki has run away, sets fire to her house, killing her bedridden mother-in-law, and disappears. Masako, preparing to flee the country, entrusts her savings and passport to Kazuo, who has developed feelings for her since their encounter on the road. Kazuo gives her his address in São Paulo, but she tears it up, unsure whether she will survive.

The final confrontation occurs after Masako's last shift. She returns to the parking lot and finds Kuniko's underwear on her car mirror. Satake seizes her and carries her into an abandoned factory beside the road. He ties her to an old conveyor belt rack and reenacts the ritual murder from his past, beating her to provoke the hatred he craves. Masako resists fiercely. He rapes her as the night wears on.

As dawn approaches, Masako begins to understand Satake's psychology: He is trapped in a cycle of reliving the murder that defined him. She recognizes a disturbing parallel between them, both damaged and isolated, both having crossed irreversible lines. When he unties her wrists, they share a moment of connection before she reaches for his knife. He stops her and beats her unconscious. Later, she slashes his face with a scalpel she had hidden in her jacket before leaving home, severing an artery.

Satake collapses. Rather than fleeing, Masako stays, pressing the wound and pleading with him to live. He reveals he has Yayoi's 50 million yen, and they speak haltingly about escaping together. He dies in her arms. Two days later, Masako stands in Shinjuku Station carrying Satake's 50 million yen and 6 million of her own. She considers visiting Kabuki-cho but decides against it, recognizing she must seek her own freedom. She heads for an elevator, resolved to buy a plane ticket and find a new door to open.